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4 Layer High Frequency PCB On 2 Cores of 32mil 0.813mm RO4003C and 12mil RO4450F for Ultrahigh Frequency Coupler
(Printed circuit boards are custom-made products, the picture and parameters shown are just for reference)
Today we talk about a type of 4 layer high frequency PCB. This PCB is built on 2 sheets of 0.813mm (32mil) RO4003C cores with 1 sheet RO4450F prepreg for the application of ultrahigh frequency coupler. Following is the stack-up.
In general, multilayer Rogers high frequency PCBs are made from all high frequency material inclusive of prepreg adhesive. As is known to all, there’re 6 cores in RO4003C family, i.e. 8mil (0.203mm) to 60mil (1.524mm).
| RO4003C: | |
| 8mil | 0.203mm |
| 12mil | 0.305mm |
| 16mil | 0.406mm |
| 20mil | 0.508mm |
| 32mil | 0.813mm |
| 60mil | 1.524mm |
Appendix: Properties of RO4003C
| RO4003C Typical Value | |||||
| Property | RO4003C | Direction | Units | Condition | Test Method |
| Dielectric Constant,εProcess | 3.38±0.05 | Z | 10 GHz/23℃ | IPC-TM-650 2.5.5.5 Clamped Stripline | |
| Dielectric Constant,εDesign | 3.55 | Z | 8 to 40 GHz | Differential Phase Length Method | |
| Dissipation Factortan,δ | 0.0027 0.0021 | Z | 10 GHz/23℃ 2.5 GHz/23℃ | IPC-TM-650 2.5.5.5 | |
| Thermal Coefficient of ε | +40 | Z | ppm/℃ | -50℃to 150℃ | IPC-TM-650 2.5.5.5 |
| Volume Resistivity | 1.7 x 1010 | MΩ.cm | COND A | IPC-TM-650 2.5.17.1 | |
| Surface Resistivity | 4.2 x 109 | MΩ | COND A | IPC-TM-650 2.5.17.1 | |
| Electrical Strength | 31.2(780) | Z | Kv/mm(v/mil) | 0.51mm(0.020") | IPC-TM-650 2.5.6.2 |
| Tensile Modulus | 19,650(2,850) 19,450(2,821) | X Y | MPa(ksi) | RT | ASTM D 638 |
| Tensile Strength | 139(20.2) 100(14.5) | X Y | MPa(ksi) | RT | ASTM D 638 |
| Flexural Strength | 276 (40) | MPa (kpsi) | IPC-TM-650 2.4.4 | ||
| Dimensional Stability | <0.3 | X,Y | mm/m (mil/inch) | after etch+E2/150℃ | IPC-TM-650 2.4.39A |
| Coefficient of Thermal Expansion | 11 14 46 | X Y Z | ppm/℃ | -55℃to288℃ | IPC-TM-650 2.4.41 |
| Tg | >280 | ℃ TMA | A | IPC-TM-650 2.4.24.3 | |
| Td | 425 | ℃ TGA | ASTM D 3850 | ||
| Thermal Conductivity | 0.71 | W/M/oK | 80℃ | ASTM C518 | |
| Moisture Absorption | 0.06 | % | 48hrs immersion 0.060" sample Temperature 50℃ | ASTM D 570 | |
| Density | 1.79 | gm/cm3 | 23℃ | ASTM D 792 | |
| Copper Peel Stength | 1.05 (6.0) | N/mm (pli) | after solder float 1 oz. EDC Foil | IPC-TM-650 2.4.8 | |
| Flammability | N/A | UL 94 | |||
| Lead-free Process Compatible | Yes | ||||
The specifications of the board are as follows:
Base material: RO4003C 32mil + RO4450F 12mil PP
Layer count: 4 layers
Type: Castellation holes (half holes) on edge
Format: 113mm x 80mm = 1 type = 4 piece
Surface finish: Immersion gold
Copper weight: Outer layer 35 μm/ Inner layer 35 μm
Solder mask / Legend: no / no
Final PCB height: 2.1 mm
Standard: IPC 6012 Class 2
Packing: 20 panels are packed for shipment.
Lead time: 10 working days
Shelf life: 6 months
You enjoy the features and benefits
1) Excellent high frequency performance due to low dielectric tolerance and loss;
2) AOI inspection;
3) Meeting your PCB needs from prototype to mass production;
4) 30000 square meter month capability;
5) 8000 types of PCB's per month;
6) More than 16 years of PCB experience;
The Applications are
(1) GPS antenna
(2) WiFi amplifier
(3) Power amplifier
(4) RF transceiver
(5) TV antenna
(6) Radar data acquisition converter
(8) Spread spectrum, Attenuator